Bisphosphinic metal complexes, process for their preparation, hydrogenation catalysts from these compounds, and a hydrogenation process employing these catalysts

摘要

1. A compound of the formula see diagramm : EP0000403,P20,F2 wherein R**3 and R**4 are C1 -C20 alkyl or aryl, namely phenyl, naphthyl, anthryl, phenanthryl or azulyl ; Y' is carbon ; Q**1 and Q**2 are methylene or oxygen ; P is phosphorus ; Ar is substituted or unsubstituted aryl, namely phenyl, naphthyl, anthryl, phenanthryl or azulyl ; M is a Group Ib or IIb metal ; X is halide ; perchlorate, tetra(fluoro or chloro)borate, hexa(fluoro or chloro)phosphate, or hexa(fluoro or chloro)-antimonate or tetraphenylborate ; n is 0 or 1, with the proviso that when n = 0, Q**1 and Q**2 are methylene and the broken line is a carbon-carbon bond and when n = 1, Q**1 and Q**2 are oxygen where each oxygen is bonded to Y' ; u is an integer from 1 to 3 ; r and s are 1 or 2 depending on the valence of M and the value of u or the dimers or oligomers thereof.